This book introduces you to the microscopic world of bacteria, from blue green algae to spirochetes. It examines how bacteria move, feed, and reproduce. It also looks at the benefits and drawbacks of how people use bacteria, as well as our body's defense against harmful bacteria. Did You Know? Bacteria may have been the first living organisms on the planet. The light that some animals give off comes from their bacteria. Some types of bacteria can divide creating two new bacteria every 15 to 20 minutes.

This book introduces you to the microscopic world of bacteria, from blue green algae to spirochetes. It examines how bacteria move, feed, and reproduce. It also looks at the benefits and drawbacks of how people use bacteria, as well as our body's defense against harmful bacteria.